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The Zika virus is carried by mosquitoes, but can also be transmitted sexually. The virus is linked to microcephaly, a condition in which babies are born with undersized brains and skulls.

The condoms will be distributed free from a clinic in the Athletes' Village, or from vending machines. The village opens on July 24 with the Olympics opening on Aug. 5.

Brazilian newspaper Folha de S.Paulo said between 100,000 to 150,000 condoms had been supplied at Olympics since 2000 in Sydney. The Sao Paulo paper, citing the IOC and local organizers, said the increase was not related to the Zika virus.